Scoring device for tile-forming dies



Jan. 12 .1926, I 1,569,665

C. E. MULLINS SCORING' DEVICE FOR TILE FORMING DIES Filed April 30 19217 Inventor Charles .E. Mullin witness:

Patented Jan. 12, 1926, I

lensescan an cimnLns MUELINS; on nomvoxn; ILL'iNois; Ass-rsNe-n T0 JOHNa: marrow; or

CHICAGO, ILLINOIS;

soomlte nnvicn Eon TILE-FORMING DIES.

Application filed April 30, 1921i Serial No. 465,688.

To all whom it may concern: 7

Be it known that I, CHARLES E; MULLINS, a citizen of the United States,having residence at Roanoke, in the county of 'Woodford and the StateofIllinois, have invented certain new and useful Improvements in,

Scoring Devices for lilesForniin-g Dies, of

which the following is ence being had to the ings,forming a partthereof. I

This invention relates to a die for molding clay into the form of hollowtile building blocks or the likeand its object is to; provide such a diewith a scoring device in which the portions, which aresubjected to themost severe wear, are made removable for re-placement without thenecessity ofrenewi-ngthe entire device. The invention consists'incertain features and elements of a specification, refertheconstructionhereinafter deseribed and shown in the drawings as indicated by theclaimsf In the drawings: V y c Figure 1 's a front-faeevie'w of ascoring device embodying this invention showing it removed from the dieand axis, of movement of the clay which is fed through it in the tilemolding process.

Figure 2 is a, detail section taken as indik cated at line 2-2 on Figure1.

Figure 3 is a rear face view of the die dis- I mounted from the augermill or hkem'ach-ine on which it is used, but showing the scoring deviceassociated with and secured tosaid die as it appears from the side atwhich the material emerges after the forming process, Figure 4 is atransverse section taken as indicated at line 4-4 on Figure 3; I

In the usual process of scoring briclrand tile as it comes from theforming die a.

toothed metal frame or comb is employed which must be frequently renewedbecause of the rapid wear to. which it is subjected on account of thefriction of the granular though plastic mixture which is fed through it.Such replacement is expensive and requires scrapping a considerableWeight of metal back of the wearing surfaces simply because the teethare made integral with the supporting parts; The present construction,therefore, provides a separate frame member, 1, to which are addedlining plates,

2, secured to its inner surfaces for contact with the plastic material;and for scoring i bolts, 3, each through the lining accompanying drawviewed along, the

the tilethe frame is; fitted wan a. pluralit of individual scoringframe, 1., Incidentally the bolts, 8, pass plates, 2,.- to. holdthelatter in place-- In order toproduce a grooving of the tile which isunder-cut and thus tends to form an interlocking. or dove-tailedengagement with the mortar when the tile 1s used in building.construction, I prefer to, use bolts 1 of the fiat-headed type in whichthe outer and. thus serve teeth in the form of removably fitted into thesurface 3, of the head is at right angles to the axis of the bolt theshank by a flaring 3 IVhile the frame, with threaded apertures and thescoring teeth screwed in them I find it simpler to 'drill straightthrough the frame, and providethe bolts with nuts, 3, as shown.

As shownin Figures fitted withlining plates, 5;,through which theplastic material is forced in the 6, are usually sup-' ported withinthespace enclosed by liners,

plates, 2, stand in planes and is connected with, frusto-comcal port on,1, might be provided 3 and 4," the die" wh ch is chosen forpurposesof'llustrating this mventlon consists ofa hollowbody por-j' 'tionPreferably the frame is formed of movement of material I pose ofslightly compressing the tile in this final step of its formation. Ihescoring teeth consisti-ngo-f bolts, 8, however are set witlr their axesperpendicularto the direction of movement so that heads,,3?, areparallel to said the result is that the grooves cut in the surface ofthe tileby these scoring teeth are slightly reduced in depth bya furthercoInpression of the upstanding ridges of the materialbetween the groovesasit encounters the converging surfaces, 2, of the lining plates, 2,after leavingthe scoring teeth. This tends to increase the undercutveffect produced in the grooves by the conical shape of the heads of thebolts,

further effects which are more fully distheplanes of their flatdirection and 3, and has some cussed in my application on the scoringprocess as such. Preferably, in settingthe bolts, 3, in the frame, 1, Iarrange them so that the slots 3 in the heads will extend t 'ansverselyof the direction of feed of mathe tile to be formed and is bounded bysurfaces conierging in the direction of movement of the materialtherethrough and scoring teeth projecting from said converging surfaces,said teeth being of greater cross section at a distance from saidsurfaces than at planes thereof in order to form undercut grooves in thematerial passed through the frame.

2. In the combination defined in claim 1 said scoring teeth being offrusto-conical form set in the frame with their axes substantiallyperpendicular to the general direction of movement of material throughthe frame and therefore oblique to the converging surfaces thereof.

3. In the combination defined in claim 1 the width of said scoringmembers measured transversely of the direction of movement of thematerial being graduated with the widest part intermediate therespective portions with which the material first contacts and fromwhich it recedes.

l. In the combination defined in claim 1 a set of removable liningplates secured to the frame and forming the said converging surfacesfrom which the scoring members project. V

5. In the combination defined in claim '1 said scoring teeth being beltswith the under surfaces of their heads of frusto'conical form. the framebeing drilled to receive the shanks of said bolts leaving the headsprojectin from its converging surface.

6. n the combination defined in claim '1 said scoring teeth being boltswith the under surfaces of their heads of frusto-conical form, the framebeing drilled to receive the shanks of said bolts leaving the headsprojecting from its converging surfaces, the

threaded ends of such shanks projecting through the frame and securingnuts applied thereto for holding the parts in assembled relation. p

7. In the combination defined in claim 2 thescoring teeth being flatheaded bolts having slots in their flat head surfaces extendingtransversely of the direction of feed of the material through the frame.

8. In combination with a die for molding tileand the like means forscoring the surface of the tile comprising a frame associated with thedie and a plurality of individual scoring teeth reniovably mounted inthe frame lining plates, removably secured to the frame providingsurfacesfor contact with material passed through the die, said scoringteeth being set through um lining plates into the frame and havingenlarged portions which project from the exposed surfaces of said platein position to score material passing through the frame and also tosecure said liningplates to the latter.

9. In a die for molding tile and the like, means for scoring the surfaceof the tile comprising an opening which approximates the cross-sectionaloutline of the tile to be formed, said opening being bounded b ysurfaces which converge in the direction of movement of the materialtherethrough and a pluralityof scoring teeth each projecting from one ofsaid surfaces and being of greater cross-section at a distance from thesur-; face than at the plane thereof; the converging portions of saidsurfaces extending beyond such teeth in the direction of move ment ofthematerial through such die.

10. In a die for molding tile and the like an opening which approximatesthe cross sectional outline of the tile to be; made, said opening beingformed by lining plates removably associated with the die and arrangedwith their surfaces which form the opening converging in the directionof movement of the tile therethrough together with bolts having heads offrusto-ctmical form set through said lining plates with theirconicalsurfaces spaced therefrom whereby said heads will serve asscoring teeth for grooving the surface of the tile as the latter isforced through the opening.

In testimony whereof, I have hereunto set my hand at Roanoke, Illinois,this 26 day of April, 1921.

CHARLES E. MULLINS.

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